Ventilator blind



April 4, 1939. T. COPELAND VENTILATOR BLIND 2 Sheets-Sheet Filed May 21,1938 A itorneys April 4, 1939. T. COPELAND VENTILATOR BLIND Filed May21, 1958 2 Sheets-Shem 2 Inventor 17/6560 o/ze/a/mi By Patented Apr. 4,1939 UNITED STATES PATENT OFFICE 4 Claims.

This invention appertains to new and useful improvements in blinds suchas can be used on windows and doors, the same being of the ventilatingtype, permitting entrance of air to the desired regulated degree.

The principal object of the present invention is to provide a ventilatorin the nature of Venetian blinds which can be readily controlled in amore accurate and satisfactory manner than the conventional types ofVenetian blinds now in general use.

Another important object of the invention is to provide a blind whichcan be conveniently regulated to control the volume of air passingtherethrough.

These and various other important objects and advantages of theinvention will become apparent to the reader of the followingspecification.

In the drawings:--

Figure 1 represents an inside elevational view of a window equipped withthe novel blind struc ture.

Figure 2 is a sectional view taken substantially on the line 2-2 ofFigure 1.

Figure 3 is a fragmentary enlarged detailed sectional view takensubstantially on the line 33 of Figure 1.

Figure 4 is a fragmentary enlarged detailed sectional view on the lined-t of Figure 1.

Figure 5 is a fragmentary enlarged detailed sectional view takensubstantially on the line 5-5 of Figure 1.

Referring to the dr ratings wherein like numerals designate like parts,it can be seen in 35' the drawings, and particularly Figure 2, thatnumeral 5 represents a window frame in which is located the upper sash 6and the lower sash l.

Numeral 8 generally refers to the blind structure forming the presentinvention which is situated 40 at the inside of the window frame.

This blind consists of the frame made up of the side stiles 9 and ii) inconjunction with the upper and lower rails H and 12.

The inner sides of the stiles 9 and H] are formed with vertically spacedopenings for receiving the trunnion-like extension H3 at the ends of thelouvers M, the upper edge portions of which overlap the lower edgeportions of adjacent louvers when the same are in closed position asshown in full lines in Figure 3. It can be seen particularly in Figure3, that the trunnions l3 are located in alignment with the lower edgeportions of the louvers and that the upper edge of each louver has aneye l5 driven into the same and disposed through a complementary eye ISon the control bar ll, this control bar I! traversing vertically theintermediate portions of the louvers It.

The upper end portion of the control bar I! is bifurcated to receive theadjacent end of the 5 strap l8 and securing means I9 retains this end ofthe strap to the bifurcated end of the bar ll. The strap I8 is formedwith openings .at equal spaced intervals and is disposed over the upperrail II as shown in Figure 3. An eye member or like projection 20extends upwardly from the upper rail H and this can project through anyone of the openings of the strap It to hold the louvers I4 in the properrelation, one position being shown in broken lines in Figure 3.

A cord or like flexible element 2| extends from the upper end portion ofthe bar H and through the eye 22 and also through the eye 23 at theupper end of the stile II]. From this point the cord 2| depends and isequipped with the knob 26 at its lower end.

Obviously, in the event the upper rail H is too high to be convenientlyreached, the knob 2t and cord 2| can be used.

The outer edge portions of the stiles 9 and it) are grooved as at forreceiving the outstanding flanges of the angle strips 26, these stripsbeing secured to the vertical portions of the window frame 5 assuggested in Figures 2 and 4. Thus it can be seen that the blind 8 canhe slid upwardly so that access can be had to the lower sash l. I

While the frame can be constructed in various manners, it is preferablethat the lower edge portion of the upper rail H and the upper edge ofthe lower rail l2 be rabbetted as at 21 and then beveled as at 28 toaccommodate the adjacent end portions of the louvers I4.

While the foregoing specification sets forth the invention in specificterms, it is to be understood that numerous changes in the shape, sizeand materials may be resorted to without departing from the spirit andscope of the invention as claimed hereinafter.

Having described the claimed as new is:-

1. A blind structure comprising a frame, a plurality of swingablymounted louvers in the frame, a control bar extending vertically acrossthe louvers, connections between the louvers and the control bar, aprojection on the upper portion of the frame, a strap extending over theframe and having openings therein for receiving the said projection, oneend of the strap being secured to the control bar.

invention, what is 2. A blind structure comprising a frame, a pluralityof swingably mounted louvers in the frame, a control bar extendingvertically across the louvers, connections between the louvers and thecontrol bar, a projection on the upper portion of the frame, a strapextending over the frame and having openings therein for receiving thesaid projection, one end of the strap being secured to the control bar,and a slideway for the said frame.

3. A blind structure comprising a frame, a plurality of swingablymounted louvers in the frame, a control bar extending vertically acrossthe louvers, connections between the louvers and the control bar, aprojection on the upper portion of the frame, a strap extending over theframe and having openings therein for receiving the said projection, oneend of the strap being secured to the control bar, said louvers beingprovided with supporting trunnions projecting beyond the lower edgeportions thereof and into the said frame.

4. A blind structure comprising a frame, a plurality of swingablymounted louvers in the frame, a control bar extending vertically acrossthe louvers, connections between the louvers and the control bar, a.projection on the upper portion of the frame, a strap extending over theframe and having openings therein for receiving the said projection, oneend of the strap being secured to the control bar, and a pull cordhaving one end secured to the upper end portion of the control bar, andguide means on the frame through which the pull cord is trained.

'I'ILDEN COPELAND.

